Eugen hugo arthur heetsfrich ritter von



2 Sheets-Sheet 1.

(No Model.)

E. H. A. H. R. VON NOLLENDORF.

ELECTRIC ARG LAMP.

Patented Deo.22,1896.

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(No Model.) 2 Sheets*Sheet 2.

E. H. A. H. R. VON'NOLLENDORP.

ELECTRIC ARG LAMP.

No.'573,526. Patented 1390.22, 1896.

Wz/ MM UNITED STATES PATENT OFFICE.

EUGEN HUGO ARTHUR HEINRICH RITTER VON NOLLENDORF, OF VIENNA, AUSTRIAIIUNGARY.

ELECTRIC-ARC LAlVl P.

SPECIFICATION forming part 0f Letters Patent N 0. 573,526, dated December 22, 1896.

Application filed April 9, 1896. Serial No. 586,858. (No model.)

To eZ/Z whom, t may concern,.-

Be it known that 1, EUGEN HUGO ARTHUR HEINRICH RITTER voN NoLLENnoRE, a subject of the Emperor of Austria-Hungary, re-

5 siding at Vienna, Austria-Hungary, have invented certain new and useful Improvements in Arc-Lamps, of which the following is aspecification.

An arc-lamp constructed according to this invention is distinguished from those used hitherto by its having an extremely simple regulating mechanism which does not necessitate the provision of the tubular upper part which in existing arc-lamps contains the complicated regulating mechanism. The carbonholder, which has to be automatically adj usted by the regulating mechanism, serves by its weight to drive a simple stop mechanism comprising an escapementewheel and a pallet or anchor, the latter being operated upon by an eleetromagnet which is placed in a shunt-circuit.

The invention will be best understood by reference to the accompanying drawings, in which- Figure 1 is a longitudinal vertical section through the lamp with the regulating mechanism in elevation. Fig. 2 is a plan of the disk supporting that mechanism, and Figs. 3 and it are views showing such parts of the arc tension devices as are not shown in Fig. 1.

In the lamp illustrated the lower carbon K is to be considered as stationary, unless it be moved by a device to be described later on for the purpose of producing tension of the arc, while the upper carbon K' is being adj usted for regulating the light. For this purpose the carbon-holder A for K is adjustable on the rods b b by means of rollers d, which Inay be replaced by sliding blocks. The rods l) b' are secured at their upper ends in the disk B and at their lower ends in the crossbar B', and h is in electrical connection with the disk B and b is insulated therefrom. The 45 current to the carbon K may be led from the main line-wire I through the binding-screw 1 and the conductor 2, which hangs down in a loop and is iiexible; but the current may also be collected from the rod b by the guide- 5o rollers a in contact therewith, in which ease it is advisable to also employ springs 3 as slidrel G, to which its end is fixed.

ing contacts, as shown in dotted lines in Fig. 1. The rollers a, traveling on the rod b', are preferably made of non-conducting material.

The carbon-holder A is suspended by a cord or equivalent 4, which passes through a hole in the middle of the disk B over a guideroller and several times round a drum or bar- The barrel 6 turns upon the fixed spindle 7, to which it is connected by a weak spring S in such manner as to give tension to this spring when the cord is being unwound. Round the'spindle '7 turns also the escapement-wheel 0, the upper side of which is provided with ratchetfteeth. A pawl 10, pivoted to the drum 6, engages with these teeth in such manner that during the unwinding of the cord l from the drum and the consequent rotation of the latter the escapement-wheel has to move with the drum.

The weight of the carbon-holder A and carbon K', acting on the barrel 6 through the cord d, tends therefore to rotate the barrel and the escapement-wheel in the direction indicated by the arrow in Fig. 2. If these parts were uncontrolled, the carbon K' would fall onto the carbon K and the spring S would be energized. This operation is prevented or regulated in the following manner: A bifurcated lever C, pivoted at c, Fig. 2, to the disk B, engages the escapement-teeth of the wheel 9 and essentially corresponds to the pallet or anchor of a watch or similar escapement. Vhen the lever is in its normal position, the tooth 12 engages, under the inliuence of the spring 11, in the space between the teeth of the wheel 9. NVhen the lever C (which is hereinafter referred to as a pallet) is swung against the influence of the spring 11, the pallet-tooth 12 lets one tooth of the escapementwheel 9 pass, while the second pallet-tooth 13 engages with the wheel, this tooth 13 in its turn allowing another tooth to pass when the pallet is moved backward by the spring 11. If the teeth are very fine, the carbon-holder A descends to a very slight extent at each swing of the anchor. The long arm of the pallet O constitutes an armature which is attracted by the electromagnet D when the iron core thereof is magnetized by an electric current being passed around it. The coil of this electromagnet (hereinafter referred to as the coil IOO l is placed in shunt-circ uit between the conductors I and II. A conductor I4 leads I' rom II to the coil D, and from there a conductor 15 leads to an adjustable contact oi' the binding-screw or terminalv 1G, insulated from the disk Il. In the normal position ot' the lever (l the contact-spring 17 thereof bears against the binding-screw 1G, and is therefore in electrical connection with t-he conductor I through the lever C, pivot c, and disk IE.

Il the current passes through the coil I) instead of passing through K' and K in the shape ot' an are, the armature C is attracted by the electromagnet D, the pallet-tooth 12 releases the wheel tl, and the tooth 125 engages it; but at the same time the spring 17 moves out of electricalv contact with the bindingscrcw or terminal 1G, the current is Ainterrupted, andthe spring ll begins to act and returns the armature (l to its original position. This play continues till the cai-bons, when startin the lamp, touch each other, and aittcr the lamp is started till the proper distance between the carbons is arrived. at. In regular action the current passes, oi' course, after the are has been t'ormed, between l and l( through the rod h and the conductor II; but between l and D there are inserted the electromagnetic coils of the device for producing` tension in the are, which device may be dcscribed as it'ollows:

l `rom the cross-bar ll depends a sleeve or socket E. It carries a cross-piece c, which, together with the iron cores e of the coils Il, forms an electromagnet of horseshoe form. The conductors IS and if) connect one of the coils with l1' and the other with the cross-bar while the coils are connected to each other by a conductor 20. The cross-bar IS insulated from the rods h and h. The armature ol' the horseshoe magnet c c c is represented by the cross-piece It of the holder for the carbon lx', which cross-piece is prevented from turning by pins on the sleeve IC. A pin f ot the cross-piece Il slides in the socket llt. The metallic contact between Vthe cross-piece l? and the pins 2l and the socket E and pin f secures efficient electric contact. A spring 225, Ifig. 3, the compression or eilcctive strength ot which can be regulated by a screw-plug 22, lifts the crosspiece F from e c'. A nut 2-1.- on the screwthreaded continuation ol the pin flimits the upward movement.

The mechanism of the lamp as a whole works in the following manner: At the start the carbons do not touch. Therefore the current passes from the conductor I through l, c, C, IT, 16, 15, I), and li into II. The armature C is alternately attracted and released and the escapement-wheel t) and the barrel (5 are rotated, against the influence of the spring S, by the weight of A and K. The carbon Ii descends till it touches K. Then the current passes through I, Il, l, 2, A, and the carbons; but at the same time the electromagnet E is energized, as the current passes through Il llJ, the ltwo coils h', wires 2d, 1S, and rod h and thence through the conductor II. In consequence the crosspiece or armature Il is attracted and the arc strained. Then the ,lamp is in'regular working order. IE the distance between the carbons becomes too great, the resistance arising through that causes the current to again pass through the coil I), and the stopping arrangement begins again to play, tillv the consumption of the carbons is compensated for and the proper distance between the carbons reached.

When the carbons are consumed, the carbon-holder A is raised. Then the spring s winds the cord elon the barrel (i, the pawl llt) sliding' over the teeth el' the wheel 9. The stopping arrangement need not therefore be turned backward when replacing old cai-bons by new ones.

Particular attention is drawn to the iact that in consequence of eXtreme simplicity ol:` construction nearly all parts oit the lamp may be cast, which was impossible in the arc-lamps used hitherto, owing to their complicated regulating mechanism.

Under the term cord herein. used I include cha-in or any other ilexible connections, these, if metallic, being suitably insulated where necessary.

I claimil.. In an a rc-lamp, the combination with the frame and two carbon-holders thereon, oi a drum pivoted on the .rame to turn .in a hori- Zonta-l plane, a cord connected to the uppercarbon holder' and drum, an eseafjviementwheel adapted to turn independently ol. the

drum in one direction, means for lockingthe drum and escapement-whecl together a pallet pirotally mounted on the trame to swing in a horizontal plane, in operative connection with the escapement-wheel, the magnet i'or operating the pallet and conductors electrically connected with the cai-bons and magnet; substantially as described.

2. In an are-lamp the combination with the traine and two carbon-holders therein, a drum piroted to the trame to turn in a horizontal plane, the escapement-wheel mounted on the pivot of the drum, a cord connected to the upper-carbon holder and drum, an electrov magnet mounted on the frame, a pallet orleyer with two unequal arms and pivotcd to swing in a horizontal plane, the shortarm ot the lever forming an escapement-pawl and engaging the escapement-whecl, the longer arm ot' said lever constituting the armature of the magnet, and conductors connected with the carbons and electromagnet, substantially as described.

b. In an arc-lamp the combination with the trame and two carbon-holders therein, a piaf'ot on t-he frame, the drum on the pivot, a spring connecting the drum and pivot, an escapement-wheel on said pivot, formed with two sets ot teeth, a pawl carried by the pivot and engaging' one setot teeth of the escapement- IOO IIO

Wheel to hold it in operative connection with the drum, a cord connecting the upper-carbon holder and drum, a pallet or lever pivoted on the frame to swing in horizontal plane, having` one short and one long arm7 the short arm forming' an escapement-pawl and engaging` the other set of teeth of the escapement and the long,` arm constituting' the magnet-armature, the electromagnet in shunt, and conductors electrically connected with the carbons and magnet; substantially as described.

4:. In an arc-lamp the combination With the frame and two carbon-holders movable therein of a pivot on the frame a drum on the pivot a spring connecting` the drum and pivot an escapement-Wheel in operative connection with the drum a cord connecting the uppercarbon holder and drum a pallet engaging the escapement-Wheel an electromagnet operating the pallet an armature on the lower carbon-holder a guide and stop for this armature an electromagnet on the frame and a spring in the guide for moving said armature in respectively opposite directions a nut adjustment for the spring and conductors electrically connected with the carbons and electromagnets.

In Witness whereof I have hereto set my hand in the presence of the two subscribing` Witnesses.

EUGHN HUGO ARTHUR HEINRICH RITTER VON NOLLHNDORF. V'Vitnesses:

JOHN KAFKE, ROYNSTAR YoKoF. 

